Cara Menggunakan Desikator - STFI Edukasi

Summary

This video provides a detailed guide on using a desiccator, an airtight container designed to store substances in a dry environment. The explanation covers the desiccator's components, including its lid, body, and support for the desiccant (silica gel). Silica gel, which absorbs moisture, is described as being effective when blue in color, indicating it can still absorb water. The video also explains how to use the desiccator by adding active silica gel, sealing the desiccator with a layer of vaseline to ensure an airtight seal, and handling samples properly. The tutorial emphasizes the importance of laboratory safety.

Takeaways

• 😀 Desicators are airtight containers made of glass, designed to store materials and absorb moisture using a desiccant.
• 😀 A desiccator has two main parts: the lid and the body. Inside the body, there are two sections: the lower section for storing desiccants, and the upper section for storing materials or samples.
• 😀 The desiccator lid and body are sealed with a layer of vaseline to ensure the container is airtight.
• 😀 The desiccant used in a desiccator is typically silica gel, which comes in granular or crystalline form and absorbs moisture from the stored materials.
• 😀 Silica gel is effective in drying and controlling moisture levels, and its color changes when it becomes saturated with water.
• 😀 Blue silica gel is the most effective and indicates that it is still capable of absorbing moisture. Once it becomes saturated, it turns pink.
• 😀 Saturated silica gel can be reactivated by heating it in an oven at 110°C, turning it back to blue and restoring its moisture-absorbing properties.
• 😀 To use a desiccator, first, place the active blue silica gel into the bottom section of the container.
• 😀 A porcelain filter or support is placed inside the desiccator to ensure that the materials or samples do not come into contact with the silica gel directly.
• 😀 Once the desiccator is assembled and sealed, ensure it is tightly closed to maintain its airtight environment for effective moisture control.

Q & A

What is the primary function of a desiccator in a laboratory?

The primary function of a desiccator is to store samples and absorb moisture, helping to keep materials dry by using a desiccant like silica gel.

What materials are typically used to make a desiccator?

A desiccator is typically made of airtight glass and contains a desiccant, such as silica gel, to absorb moisture.

What are the main components of a desiccator?

A desiccator consists of two main parts: the body and the lid. The body is divided into an upper and lower section, with the lower section for the desiccant and the upper section for the samples.

What is the role of silica gel in a desiccator?

Silica gel absorbs moisture from the air within the desiccator, helping to keep the samples dry and prevent contamination or degradation due to humidity.

What is the significance of the color of silica gel in a desiccator?

Silica gel is most effective when it is blue, indicating it can still absorb moisture. When it becomes saturated, it turns pink, signaling that it needs to be regenerated by heating.

How can you regenerate saturated silica gel?

Saturated silica gel can be regenerated by heating it in an oven at 110°C, which restores its moisture-absorbing properties and turns it back to its blue color.

How do you properly seal a desiccator to make it airtight?

To make the desiccator airtight, apply a layer of vaseline on the edge of the lid where it meets the body of the desiccator to ensure a tight seal.

What is the purpose of the porcelain screen inside the desiccator?

The porcelain screen inside the desiccator is used to support the sample above the desiccant, ensuring that the sample does not come into direct contact with the silica gel.

What should you do after placing a sample inside the desiccator?

After placing the sample inside the desiccator, close the lid by sliding it back into place, ensuring that the desiccator is tightly sealed.

Why is it important to follow laboratory safety guidelines when using a desiccator?

Following laboratory safety guidelines is important to ensure the safe handling of chemicals, proper maintenance of equipment, and to avoid accidents or contamination during experiments.